Calculo

Calculo de losa aligerada en 2 sentidos




















c. largo 7.8/5=1.56
c. corto
h= c. corto
30
5/30=0.16 cms.
≈ .20 cms.


5 - .15 5.35 - .15
4.85/ .70=6.92 5.20/.70.= 7.42
7x .60=4.2 7x.60 = 4.2
4.8-4.2=0.65/60= .10 cms 5.2 – 4.2 = 1/7 = .14 cms


7.8 - .15 7 -.15
7.65/.70 = 10.92 6.85/.70=9.78
11x.60=6.610x.60=6
7.65x6.6=1.05/10 6.85-6=.85/9=.09 cms
=.10 cms




V.T. =7.8X5.35X.20=8.351 m3
V.A. =.60X.60X.15=.054 m3
V.C. =8.351-4.158 m3
4.193 m3x2400 kg/m3=10063.2
4.6 k/pzs. 308=1416.8
=11,480


P.P LOSA 275.101
C.M. P.P. DUCTO 25
P.P. EMP. 40P.P. IMP. 2
P.P LUM. 25
P.P. PLAFON 22
P.P. RELLENO18
TOTA = 407.101





W LOSA= 1.2 C.M. + 1.6 C.V.
(1.2)(407.101)+1.6(170 kg/m3)=760.521

N-1

[pic]



W N-1 W LOSA X A.T. X 60%
760.521 X .45 X.60 = 205.340






205.340 X 7.8/2 = 800.826
1.15 X205.340 X 7.8 /2 = 920.949
1.15 X 205.340 X 7/ 2 = 826.493
205.340 X 7/ 2 = 718.69



205.340 x 7.8² /16 = 780.805
“ x “ /10 = 1249.288
“ x “ /14 = 892.348
“ x 7 /10 = 100.616
“ x 7 /16 = 628.85







| M. MAX. | bw | d | AS | # vrs. Ø|
| 780.805 | 15 | 17 | 1.424 | 2 # 3 |
| 1249.288 | 15 | 17 | 2.279 | 2 # 4 |
| 892.348 | 15 | 17 | 1.628 | 2 # 3|
| 100.616 | 15 | 17 | 1.835 | 2 # 3 |
| 628.85 | 15 | 17 | 1.147 | 2 # 3 |


AS = (M. MAX.)(100)
Ø F´Y (d - ±2)

780.805 x 100 = 78080.5 = 1.424
(.9) (4200) (17 -5/2)54810

1249.288x 100 = 124928.8 = 2.279
(.9) (4200) (17 -5/2) 54810

89234.8x 100 = 89234.8 = 1.628
(.9) (4200) (17 -5/2) 54810

100.616x100 = 10061.6 = 11.835
(.9) (4200) (17 -5/2) 54810

628.85x 100 = 62885 = 1.147
(.9) (4200) (17 -5/2) 54810

# vrs.= AS/Ø vrs. Revisiónpor corte

1.424/.71= 1.267 Vd = V Max. – W N – N1 ( d)
2.279/1.27=1.12 920.949 – 205.340 x .17 = 886.041
1.628/.71=1.43 = 886.041
1.835/.71=1.61
1.147/.71=101

Uvd = vd
Ø bd
886.041/ (.9)(15)(17) = 3.860≈ .20 cms.
5 - .15
4.85/ .70=6.92
7 x .60=4.2
4.8-4.2=0.65/60= .10 cms

7.8 - .15
7.65/.70 = 10.92
11x.60=6.6
7.65x6.6=1.05/10
=.10 cms

V.T. =7.8X5.35X.20=8.351 m3
V.A. =.60X.60X.10=.036 X 77 = 2.772 m3
V.C. =8.351-2.772 = 5.579 m3
5.579 m3 x 2400 kg/m3=13389.6
4.6 k/pzs. 308=1416.8
= 14806.4

14806.4 kg...